I've just read an update with the voices of people in Gaza, understandably they have not revealed their identities:
Unidentified sources in Gaza told Ynet that Hamas gunmen were deployed throughout the area to prevent the demonstrations from spreading to multiple locations.
According to these same sources, armed terrorists were positioned near gathering points, movement of civilians in areas of displacement camps was restricted, and in some cases, phones were reportedly confiscated from participants or individuals identified as linked to the protest calls.
One of the protest organizers reportedly told Kan News that participants were facing severe threats from Hamas. “They accused us of treason,” the source stated.
“They threaten anyone who opposes Hamas. All of us are in danger, but we still believe we deserve to live without a terrorist organization.”
Another reported protester in Gaza told Ynet, “The atmosphere on the ground was one of clear pressure, and any attempt to organize the public was met with an immediate response from security forces.”
Conversely, Hamas supporters apparently claimed that these measures were intended “to protect public order and prevent chaos in times of war.”
https://www.jpost.com/middle-east/article-900645